The one with the greater electronegativity difference. Electronegativity increase up and to the right of the periodic table, so the atom that is attached to O with smallest electronegativity should be the one with the highest melting point. But I am not 100% positive.
SrO is my choice.
Which compound would you expect to have the highest melting point?
BeO
MgO
CaO
SrO
2 answers
devron you're wrong mate
because Be has the highest electronegativity difference, it will form the most polar molecule meaning the permanent diploe-dipole forces will be the strongest, therefore the highest melting point
because Be has the highest electronegativity difference, it will form the most polar molecule meaning the permanent diploe-dipole forces will be the strongest, therefore the highest melting point